Tripp Lite 277/480V AC, 240/415V AC, 230/400V Multiple UPS Operation Parallel, Operational Modes

Multiple UPS Operation (Parallel)

The diagrams and procedures in this section apply to a parallel configuration where multiple UPS Power Modules (up to eight) are connected to a single equipment load. A parallel configuration provides fail-safe redundancy, assuring that the load is constantly supported even if one or more UPS Systems fail or are taken off-line for maintenance. Two or more UPSs operating in parallel must have the same VA capacities, output voltage and frequency. They also must be able to assume an equal share of the equipment load in order to not overload the UPSs and switch all UPSs to Reserve AC Input Supply Mode.

•Operational Modes

•Optional Parallel Configurations (Hot Standby Redundancy and Common Battery)

•Start-Up Procedure

•Shutdown Procedure

•Manual Maintenance Bypass Procedure

Operational Modes

Normal Mode

In this mode, the power modules continuously convert AC input power into DC power (to recharge their batteries and supply their inverters). Their inverters, in turn, transform DC power into clean, stable AC output power for the connected equipment load.

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